i dont think he wants you to have a dick he just thinks tranny porn is hot thats all thinking that tranny porn is hot and feeling that you are hot just the way you are are not mutually exclusive also keep in mind that he might think that tranny porn is hot as a fantasy but he may not be interested in acting out the fantasy in real life you guys should just have a relaxed casual talk about this if you have any insecurities bring them up and ask for reassurance im sure you guys will be fine though